feat(systemd): add WantedBy option with default multi-user.target

[kongfei605]

已经给原repo提了PR， https://github.com/kardianos/service/pull/415， 等merge后再替换回来。

[Copilot]

Pull request overview

This PR enables proper systemd service configuration by adding support for the WantedBy option through a dependency replacement. The codebase already sets WantedBy to multi-user.target (for system services) or default.target (for user services) in service_linux.go, and this change provides the underlying library support to make that configuration functional.

• Replaces github.com/kardianos/service with a fork github.com/kongfei605/service v1.2.2 that supports the WantedBy systemd option
• Updates go.sum with the new dependency checksums and removes the original kardianos/service entries
• Removes an unused golang.org/x/sys dependency entry

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 1 comment.

File	Description
go.mod	Adds replace directive to use kongfei605/service fork v1.2.2 instead of kardianos/service
go.sum	Updates checksums by removing kardianos/service entries and adding kongfei605/service v1.2.2 entries; also removes an unused golang.org/x/sys entry

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[Copilot]

Using a personal fork (github.com/kongfei605/service) without documentation raises maintainability and security concerns. Consider:

1. Adding a comment in the code or README explaining why this fork is necessary and what features it adds (specifically WantedBy support for systemd)
2. Linking to the upstream PR or issue if one exists
3. If the changes are necessary long-term, consider contributing them back to the original kardianos/service repository

This helps future maintainers understand the dependency choice and reduces security risks from using unmaintained forks.

Suggested change

	replace (
	replace (
	// NOTE: Using kongfei605's fork of kardianos/service for WantedBy support in systemd.
	// See: https://github.com/kardianos/service/pull/410